Ditto...on my recent Liberty cruise I also witnessed many passengers talking endlessly on their phones. My phone was turned off and locked in the safe.
Dw and I were on R & R and the last thing we wanted was to hear about reality at home. We are senior cruisers and had arrangements made to handle any emergency at home. We use Bellsouth (AT&T) and could have used our phone in San Juan or St. Thomas but decided NO! We were on vacation.

Post cruise depression will kick the phone users in the butt when they receive their cell phone bill.